...get a bowl of water, pour little bits of all the different shades you want, it should float on the top, swirl with a toothpick or something like it and when it looks like you want on top of the water, then dip your nails through the water...probably the best thing I've ever seen.
Purple Icing Magnetix nail polish with a couple of coats of SV. I put this on a couple of days ago, so there's a little bit of tipwear. I like the Icing magnet so much better than the China Glaze one. The magnet seems to be stronger and the designs came up easily even on my curvy nails. The polish dried to a relatively matte finish and really benefitted from the shine of a good top coat.